Indoor single-phase epoxy resin casting current transformer complying with GB/T20840.1/2 and IEC61869-1/2 standards; rated insulation level 24/65/125kV, rated frequency 50/60Hz, rated secondary current 5A or 1A. Optional primary current covers 300-2000A; accuracy-class rated outputs range 10-50VA for different accuracy grades including 0.2(S),0.5(S),5P10,5P15,5P20; short-time thermal current ranges 45-100kA, rated dynamic stable current ranges 112.5-160kA; product weight:48kg; ambient operating temperature -5℃~+40℃.
Indoor 10kV current transformer for medium-voltage switchgear, suitable for metering and protection up to 20kV systems.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LDZJ9-20 | Factory nameplate marking |
| Primary Voltage | 10kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | 5A/1A | Ratio check at rated frequency |
| Accuracy Class | [On Request] | Accuracy test (IEC 61869-2 / IEEE C57.13) |
| Rated Burden | [On Request] | Burden test at rated VA |
| Insulation Type | Dry Epoxy Resin | Dielectric tests per standard |
| Insulation Level (BIL) | 12/42/75kV | Power-frequency & lightning impulse withstand |
| Standards | [On Request] | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | Ambient: -5℃~+40℃ | Per datasheet limits |
Ideal For
Not Recommended For
Connect primary through the window. Secondary terminals: 1S1 and 1S2 for metering, 2S1 and 2S2 for protection if applicable. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869-2 terminal markings.
Compliant with: [On Request]
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level of this CT?
A: The insulation level is 12/42/75kV, meaning 12kV system voltage, 42kV power-frequency withstand, and 75kV lightning impulse withstand.
Q: What secondary currents are available?
A: Secondary current is 5A or 1A as per specification.
Q: Is this CT suitable for outdoor use?
A: No, it is designed for indoor use only.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Rated primary current I 1n (A) | Accuracy classCombined | Accuracy class & rated output (VA) COSφ=0.8 0.2 (S) | Accuracy class & rated output (VA) COSφ=0.8 0.5 (S) | Accuracy class & rated output (VA) COSφ=0.8 5P10 | Accuracy class & rated output (VA) COSφ=0.8 5P15 | Accuracy class & rated output (VA) COSφ=0.8 5P20 | Short-time thermal current Ith (kA/S) | Rated dynamic current Idyn (kA) | Weight (kg) Weight |
|---|---|---|---|---|---|---|---|---|---|
| 300-400 | 0.2(S)/0.2(S)/5P 0.2(S)/0.5(S)/5P 0.2(S)/5P 0.5(S)/5P | 10 | 10 | 20 | 15 | 10 | 45 | 112.5 | 48 |
| 500-600 | 0.2(S)/0.2(S)/5P 0.2(S)/0.5(S)/5P 0.2(S)/5P 0.5(S)/5P | 10 | 10 | 30 | 15 | 20 | 63 | 130 | 48 |
| 700-800 | 0.2(S)/0.2(S)/5P 0.2(S)/0.5(S)/5P 0.2(S)/5P 0.5(S)/5P | 15 | 20 | 40 | 30 | 25 | 63 | 130 | 48 |
| 1000 | 0.2(S)/0.2(S)/5P 0.2(S)/0.5(S)/5P 0.2(S)/5P 0.5(S)/5P | 20 | 30 | 50 | 40 | 30 | 80 | 160 | 48 |
| 1200-1250 | 0.2(S)/0.2(S)/5P 0.2(S)/0.5(S)/5P 0.2(S)/5P 0.5(S)/5P | 20 | 30 | 50 | 40 | 30 | 80 | 160 | 48 |
| 1500-2000 | 0.2(S)/0.2(S)/5P 0.2(S)/0.5(S)/5P 0.2(S)/5P 0.5(S)/5P | 20 | 30 | 50 | 40 | 30 | 100 | 160 | 48 |
Dimension & outline drawing of LDZJ9-20 — click image to zoom / view original.
